# Apache Traffic Server vs Caddy

| Attribute | Apache Traffic Server | Caddy |
|---|---|---|
| **Vioscale score** | 75.8 (15% (low)) | 53.3 (38% (low)) |
| activity.commits_last_30d | 100 | 28 |
| adoption.dependent_repos | - | 2,153 |
| adoption.github_stars | 1,977 | 75,225 |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | An open-source proxy that caches and forwards HTTP traffic at scale. Supports HTTP/1.1 and HTTP/2 protocols with extensible plugin APIs, deployed by major CDNs and content providers worldwide. | An open-source HTTP server that automatically enables and renews HTTPS certificates for all domains, provides flexible JSON-based configuration with adapters for other formats, and includes a fully-managed internal PKI system for securing internal services and clusters. |
| integrations.count | - | 14 |
| integrations.list | - | `[{"name":"Cloudflare"},{"name":"Google Cloud DNS"},{"name":"TencentCloud DNS"},{"name":"Docker"},{"name":"Kubernetes"},{"name":"Consul"},{"name":"CrowdSec"},{"name":"Umami"},{"name":"Bunny CDN"},{"name":"OAuth 2.0"},{"name":"LDAP"},{"name":"OpenID Connect"},{"name":"SAML"},{"name":"Google Cloud KMS"}]` |
| language.primary | C++ | Go |
| license.spdx | Apache-2.0 | Apache-2.0 |
| platform.support | - | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://trafficserver.apache.org","retrievedAt":"2026-08-19T21:11:26.360Z"}` | `{"type":"open_source","summary":"Open source with optional paid commercial support through sponsorship tiers","freeTier":true,"sourceUrl":"https://caddyserver.com","retrievedAt":"2026-08-19T21:12:25.244Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | - | 24 |
| release.history | - | `[{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.4","date":"2026-06-03T06:52:22Z","type":"stable","version":"v2.11.4"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.3","date":"2026-05-12T15:18:58Z","type":"stable","version":"v2.11.3"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.2","date":"2026-03-06T02:43:43Z","type":"stable","version":"v2.11.2"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.1","date":"2026-02-23T04:21:44Z","type":"stable","version":"v2.11.1"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.0-beta.2","date":"2026-01-06T18:02:07Z","type":"prerelease","version":"v2.11.0-beta.2"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.11.0-beta.1","date":"2025-12-04T20:48:19Z","type":"prerelease","version":"v2.11.0-beta.1"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.2","date":"2025-08-23T03:10:31Z","type":"stable","version":"v2.10.2"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.1","date":"2025-08-22T16:14:52Z","type":"stable","version":"v2.10.1"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.0","date":"2025-04-18T20:46:28Z","type":"stable","version":"v2.10.0"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.0-beta.4","date":"2025-03-25T03:33:16Z","type":"prerelease","version":"v2.10.0-beta.4"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.0-beta.3","date":"2025-03-24T22:46:51Z","type":"prerelease","version":"v2.10.0-beta.3"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.0-beta.2","date":"2025-03-09T13:51:09Z","type":"prerelease","version":"v2.10.0-beta.2"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.10.0-beta.1","date":"2025-03-06T18:23:58Z","type":"prerelease","version":"v2.10.0-beta.1"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.9.1","date":"2025-01-08T15:22:53Z","type":"stable","version":"v2.9.1"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.9.0","date":"2024-12-31T17:34:20Z","type":"stable","version":"v2.9.0"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.9.0-beta.3","date":"2024-11-05T18:32:38Z","type":"prerelease","version":"v2.9.0-beta.3"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.9.0-beta.2","date":"2024-10-02T22:33:58Z","type":"prerelease","version":"v2.9.0-beta.2"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.8.4","date":"2024-06-02T12:24:47Z","type":"stable","version":"v2.8.4"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.8.2","date":"2024-06-02T04:46:25Z","type":"stable","version":"v2.8.2"},{"url":"https://github.com/caddyserver/caddy/releases/tag/v2.8.1","date":"2024-05-30T14:31:22Z","type":"stable","version":"v2.8.1"}]` |
| security.disclosure_policy | yes | - |
| security.hipaa | - | yes |
| security.pci | - | yes |
| security.scorecard | 7.4 | 9.2 |
| security.vulnerabilities | - | `{"count":7,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fcaddyserver%2Fcaddy&per_page=100","last_12m":3,"max_severity":"CRITICAL"}` |

## Capabilities (Reverse Proxies)

| Capability | Apache Traffic Server | Caddy |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Tls termination | - | - |
| Automatic HTTPS acme | - | - |
| HTTP caching | - | - |
| Hot config reload | - | - |
| Clustering ha | - | - |
| Rate limiting | - | - |
| Identity aware proxy | - | - |

*Source: Vioscale. Generated 2026-09-01T16:39:13.103Z. "-" = undocumented, not absent.*